US election 2020: Biden says White House co-operation 'sincere'

Stephen Wertheim from the Quincy Institute, a think tank focused on foreign policy, says the new Democratic team in the White House may end up acting like the old one, a group of centrists who, he says, focused more on military threats than on issues such as climate change. He adds: \"Progressives have a right to be concerned about whether there will be significant change.\"